--- /sys/dev/zs/zs.c.orig	Sun Aug 24 10:11:06 2003
+++ /sys/dev/zs/zs.c	Sun Aug 24 10:11:21 2003
@@ -463,7 +463,7 @@
 
 	if ((tp->t_state & TS_ISOPEN) != 0 &&
 	    (tp->t_state & TS_XCLUDE) != 0 &&
-	    !suser(td))
+	    suser(td) != 0)
 		return (EBUSY);
 
 	if ((tp->t_state & TS_ISOPEN) == 0) {